﻿The <em>IfcPresentationLayerWithStyle</em> shall only be used to assign subtypes of <em>IfcGeometricRepresentationItem</em>'s and to <em>IfcMappedItem</em>. There shall be no instance of subtypes of <em>IfcRepresentation</em> in the set of <em>AssignedItem</em>'s.
<blockquote class="change-ifc2x4">IFC4 CHANGE&nbsp; New where rule.</blockquote>